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A spatial mutation model with increasing mutation rates

Published online by Cambridge University Press:  03 April 2023

Brian Chao*
Affiliation:
Cornell University
Jason Schweinsberg*
Affiliation:
University of California San Diego
*
*Postal address: 310 Malott Hall, Ithaca, NY 14853. Email: bc492@cornell.edu
**Postal address: Department of Mathematics, 0112; University of California, San Diego; 9500 Gilman Drive; La Jolla, CA 92093-0112. Email: jschweinsberg@ucsd.edu

Abstract

We consider a spatial model of cancer in which cells are points on the d-dimensional torus $\mathcal{T}=[0,L]^d$, and each cell with $k-1$ mutations acquires a kth mutation at rate $\mu_k$. We assume that the mutation rates $\mu_k$ are increasing, and we find the asymptotic waiting time for the first cell to acquire k mutations as the torus volume tends to infinity. This paper generalizes results on waiting for $k\geq 3$ mutations in Foo et al. (2020), which considered the case in which all of the mutation rates $\mu_k$ are the same. In addition, we find the limiting distribution of the spatial distances between mutations for certain values of the mutation rates.

Type
Original Article
Copyright
© The Author(s), 2023. Published by Cambridge University Press on behalf of Applied Probability Trust

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